Ronstan RF15171 Series 15 Upright Lead Block

Smallest and lightest ball bearing block available. Precision moulded acetal sheave running on stainless steel ball bearings provide high performance & low friction. Single loop head blocks include an O-ring to separate running line from head lashing or fixing.

Can be used for control lines, vangs, cunninghams and tweakers as well as for shock cord tensioning systems.

• Sheave diameter: 15mm
• Maximum rope diameter: 5mm
• Maximum working load: 120kg
• Breaking load: 550kg
• Weight: 9g

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